The ACME DNS-01 self-check resolved through CoreDNS and never saw the TXT
record. The wildcard renewal stalled on 2026-09-23 and riotpiao-com-tls
expired on 2026-10-23. Every Cloudflare Tunnel origin then failed with
"x509: certificate has expired or is not yet valid".
Changes:
- cert-manager: pin the self-check to the public resolvers with
--dns01-recursive-nameservers and --dns01-recursive-nameservers-only.
Verified against Let's Encrypt staging: the challenge went valid and the
certificate issued.
- comfyui and forgejo: drop the per-host tls blocks and the
cert-manager.io/cluster-issuer annotations. The wildcard covers both
hosts, and the per-host certificates (comfyui-tls, forgejo-tls) expired
with the wildcard.
- riotpiao-com-cert: document the wildcard as nginx's default certificate
and the zero-downtime renewal path.
Renewal now runs 30 days before expiry, writes the same secret, and nginx
hot-reloads without a pod restart.
Wildcard cert was left on letsencrypt-staging; staging root is not
browser-trusted so HTTPS to *.riotpiao.com fails cert validation.
Switch issuerRef to letsencrypt-prod to issue a trusted wildcard.
rock
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